package com.sky.controller.user;

import com.sky.dto.DishDTO;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("UserDishController")
@Api(tags = "用户菜品接口")
@Slf4j
@RequestMapping("/user/dish")
public class DishController {

    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查菜品
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    public Result<List<DishVO>> list(Integer categoryId) {

        //构建redis中的key
        String key = "dish_" + categoryId;
        //查询redis中是否存在菜品数据
        List<DishVO> list = (List<DishVO>)redisTemplate.opsForValue().get(key);
        //如果存在直接返回
        if(list != null && list.size() >= 0) {
            return Result.success(list);
        }
        //没有缓存，查询数据库并放入缓存
        list = dishService.getListByCategoryId(categoryId);
        redisTemplate.opsForValue().set(key, list);

        return Result.success(list);
    }
}
